What impact does the backflow of the slurry at the outlet have on the pump when it stops suddenly due to a power loss?
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In a desulfurization system, for the slurry circulation pump, if the pump stops operating suddenly due to a power loss, and the slurry at the pump’s outlet flows back, what negative effects could this have on the pump?
Reverse: issues such as loose impeller nuts, detached impellers, and other types of damage. This is an accident
Many environmental protection companies, in order to save costs, do not install valves on the pump outlet pipelines for desulfurization projects. If one encounters the situation mentioned by the original poster, it’s terrifying just to think about it. . . .
There is no check valve, and generally no valve is present at the outlet of the desulfurization circulation pump.
The impeller may loosen, the mechanical seal could be damaged due to reverse rotation, and water hammer can cause damage
It depends on the backflow rate and whether the pump’s design allows reverse rotation. For reference.
Is there usually no valve at the outlet of the desulfurization circulation pump? ? ? ? Is there any saying for this? Why are there no valves?
Same question: why is there no valve at the outlet of the desulfurization circulation pump?
Occasionally, it causes no serious damage, but it should not be reversed for long periods of time. The lock nut is designed to be in a reverse position; if it is reversed for too long, the lock nut will loosen and the impeller will fall off, leading to accidents